When Mexican authorities took Juarez drug cartel carnage king Jose Antonio Acosta Hernandez — better known as “El Diego” — into custody, he had weapons from Operation Fast and Furious on his person, the English-language transcript of the Spanish-language television network Univision’s special investigation into the scandal shows.

“When he [El Diego] was captured in Chihuahua in the summer of 2011, he was found with weapons that the American government had allowed to enter Mexico,” the anchor added.

El Diego was, until he was taken into custody, the leader of the Juarez drug cartel’s La Linea — or “enforcement arm.” According to the El Paso Times, El Diego told Mexican authorities after his capture that La Linea’s mission was, among other things, to “eliminate the members of the Sinaloa cartel in Ciudad Juárez.”

Mexican authorities have alleged El Diego is responsible for the murders of at least 1,500 people in Juarez and Chihuaha City, Mexico, according to the El Paso Times.

Tracy Schmaler, a spokeswoman for Attorney General Eric Holder, has not responded to a request for comment in response to this revelation.